As of June 1, China banned grocery stores from giving out free plastic bags to customers, joining Sweden, Ireland, and a few other places in raising awareness of how wasteful plastic bags are. (I never saw the necessity, in China as well as New York, for stores give you a bag just for Coke or to double-bag a carton of milk.) Now reusable grocery bags are being worn everywhere and sold in every other clothing shop. I found this one with Mao the Smoking Bicyclist at Grifted on Nanluoguxiang, Beijing's unofficial hipster hutong. (They also have a line of Socialist dolls.)